Road grader



June 21, 1927. 1,633,426

E. WALWORTH ROAD GRADE R Filed Jixiy s. 1926 I I [I :Z bl I 6 Inventor Attorney Patented June 21, 19 27.

UNITED STATES EDWIN WALWORTH, OF LINCOLN, NEBRASKA.

ROAD GRADER.

, Application filed July 3,

The present invention relates to a' road grader, and aims to provide structure which is exceedingly efficient and reliable in operation, simple in its construction, easy to manipulate, strong and durable, economically maintained, not likely to easily become out of order, and otherwise well adapted to the purpose for which it is designed.

WVith the above and numerous other objects in view as will appear as the description proceeds, the invention resides in'certain novel features of construction, and in the combination and arrangement of parts as willb'e hereinafter more fully described and claimed.

In the drawing:- I

Figure 1 is a top plan view of the road grader embodying the features of my invention,

Fig. 2 is a side elevation thereof, and

Fig. 3 is a fragmentary detail disassembled perspective view of one end of one of the cutter bars.

Referring to the drawing in detail, it will be seen that the numeral 5 denotes a chassis which in the present example is mounted on rear wheels'6 and front-wheels 7. It will be understood. however, that the chassis 5 may be part of any wheeled vehicle or tractor, the present mounting of the chassis being merely illustrated by way of example and for simplicity. i

A pair of spaced vertical bars 8 depend from each side of the chassis 5 and slidably receive therebetween journal boxes 9 in which is journaled. a shaft 1.0. V-shaped bracing members 11. have their ends fixed to the under edge of the chassis and their lower intermediate portions receive the lower ends of the bars 8. Back bars 12 are attached to the journal boxes 9 and rise therefrom to pass through brackets 14 mounted on the sides of the chassis.

Rack gears 15 are journaled in the hracle ets 14 and mesh with the rack bars 12. Rods 16 are connected to the rack gears 15 through universal joints 17 and are journaled for rotation in standards 18 rising from the forward portion of the chassis adjacent the center thereof. On the forward ends of the rods 16 are mountedoperating wheels 19.

In the present instance, I provide disks 20 on the shaft 10 for the purpose of mount ing spiral scraping elements designated generally by the letter S. It is apparent, however, that other equivalent means may be so that a chain from a source of 1926. Serial No. i20,s4o.

'used for the disks 20. Chains 21 are trained over sprockets provided on the shafts 10 and on a shaft 22 journaled in the chassis 5' adjacent the forward end thereof. A spring actuated tensioning device 23 is associated with each chain 21.

A sprocket 24 is mounted on the shaft 22 power may be trained thereover. if

Referring now in detail to one of the scraper bars .S'since they are all similar in construction, itwill be seen that the same is made up of an angle. iron 25 havin grooves 26 formed on the inner side thereof, and apertures 27 entering the grooves. A plurality of square teeth 28 in the form of blocks are adapted to be received in the grooves 26. A threaded lug 29 projects from each tooth 28 for piercing one of the apertures 27 so that a nut 30 may be engaged therewith, and a bolt 81 is adapted to pierce the other aperture 27 of each groove 26 alpd to be threadedly engaged with the toot 25 and has one edge thereof bent over upon itself as'is indicated at 33. Ifv desired, a cutter bar 3 1 be attached to theangle iron 25, by suitable bolts.

From the above detailed description, it will. be seen that by turning the hand wheels 19, the shaft 10.and associated parts may be raised: or lowered as desired. lVhen the shaft is lowered so that the scraper bars S engage the ground, it will'be seen that the road may be properly graded The teeth 28 are the only parts which have any sub stantial wear, and they'are easily replaceableand easily and cheaply manufactured.

From experiments I have found that this machine operates eliiciently. and in a reli able manner, and may be used to advantage on the hardest graded road, reducing the knobsthat an ordinary machine would be ineffective against, as my machine practically chisels the large knobs from the surface of the road so as to leave the road with the desired smoothness. The machine is useful also in moist earth. The. machine has been found particularly efficient as a stalk beater and for pulverizing clogs and lumps in the field so that it will perform the duties of a disk harrow, crusher, and the like.

The device makes plowing easier and assists in producing a finer and more even A guard 32 is mounted on each angle iron mulch than is possible with other machines. The present embodiment of the invention has been given merely by Way of example since in actual practice it attains the features of invention enumerated as desirable in the statement of the invention and the above description. Apparently, numerous changes in the details of construction, and in the combination and arrangement of parts may be resorted to Without departing from the spirit or scope of the invention hereinafter claimed, or sacrificing any of its advantages.

Having thus described my invention, What I claim as new is 2- 1. In a road grader, a scraper bar including an angle iron having grooves on each side portion thereof, said grooves extending transversely of said side portions, a plurality of teeth receivable in the grooves, and means for holding said teeth in said grooves.

2. In a road grader, a scraper bar including an angle iron having grooves 1n both side portions thereof, said grooves extending transversely of said side port-ions,.a plurality of teeth receivable in the grooves, and means for holding said teeth in said grooves, each tooth being of a substantially square formation.

3. In a road grader, a so 'aper bar including an angle iron having grooves in both side portions thereof, s2 id grooves extending transversely thereof, a plurality of teeth receivable in the grooves, means for holding EDWIN WALIVORTH. 

